Grancalcin Proteins

(Grancalcin, EF-Hand Calcium Binding Protein (GCA))

This gene product, grancalcin, is a calcium-binding protein abundant in neutrophils and macrophages. It belongs to the penta-EF-hand subfamily of proteins which includes sorcin, calpain, and ALG-2. Grancalcin localization is dependent upon calcium and magnesium. In the absence of divalent cation, grancalcin localizes to the cytosolic fraction\; with magnesium alone, it partitions with the granule fraction\; and in the presence of magnesium and calcium, it associates with both the granule and membrane fractions, suggesting a role for grancalcin in granule-membrane fusion and degranulation. [provided by RefSeq, Jul 2008].